RoR install on Mac OS X 10.6.4 not working!

I'm having problems with my RoR install. I followed the instruction here: http://www.michaelhamrah.com/blog/2009/12/getting-ruby-1-9-readline...

to install ruby-1.9.1-p429 (stable) with RubyGems 1.3.7 ('gem --version') and Rails 2.3.8.

I then created a rails app called my_app and generated a controller Say which contained:

class SayController < ApplicationController

def hello end

end

and a view hello.rhtml containing "Hello World!".

I then typed the url http://localhost:3000/say/hello which rendered the internal error 500:

"We're sorry, but something went wrong. We've been notified about this issue and we'll take a look at it shortly."

Strangely enough, the welcome screen (http://localhost:3000) was rendered properly, except that when I click on the "About your application's environment" link, I get the same error message. The webrick output is:

=> Booting WEBrick => Rails 2.3.8 application starting on http://0.0.0.0:3000 => Call with -d to detach => Ctrl-C to shutdown server [2010-08-02 20:03:41] INFO WEBrick 1.3.1 [2010-08-02 20:03:41] INFO ruby 1.9.1 (2010-07-02) [i386-darwin10.4.0] [2010-08-02 20:03:41] INFO WEBrick::HTTPServer#start: pid=722 port=3000 /!\ FAILSAFE /!\ 2010-08-02 20:03:58 +0200 Status: 500 Internal Server Error no such file to load -- sqlite3

/usr/local/lib/ruby/gems/1.9.1/gems/activesupport-2.3.8/lib/active_support/dependencies.rb:156:in `require'
/usr/local/lib/ruby/gems/1.9.1/gems/activesupport-2.3.8/lib/active_support/dependencies.rb:156:in `block in require'
/usr/local/lib/ruby/gems/1.9.1/gems/activesupport-2.3.8/lib/active_support/dependencies.rb:521:in `new_constants_in'
/usr/local/lib/ruby/gems/1.9.1/gems/activesupport-2.3.8/lib/active_support/dependencies.rb:156:in `require'
/usr/local/lib/ruby/gems/1.9.1/gems/activesupport-2.3.8/lib/active_support/core_ext/kernel/requires.rb:7:in `block in require_library_or_gem'
/usr/local/lib/ruby/gems/1.9.1/gems/activesupport-2.3.8/lib/active_support/core_ext/kernel/reporting.rb:11:in `silence_warnings'
/usr/local/lib/ruby/gems/1.9.1/gems/activesupport-2.3.8/lib/active_support/core_ext/kernel/requires.rb:5:in `require_library_or_gem'
/usr/local/lib/ruby/gems/1.9.1/gems/activerecord-2.3.8/lib/active_record/connection_adapters/sqlite3_adapter.rb:10:in `sqlite3_connection'
/usr/local/lib/ruby/gems/1.9.1/gems/activerecord-2.3.8/lib/active_record/connection_adapters/abstract/connection_pool.rb:223:in `new_connection'
/usr/local/lib/ruby/gems/1.9.1/gems/activerecord-2.3.8/lib/active_record/connection_adapters/abstract/connection_pool.rb:245:in `checkout_new_connection'
/usr/local/lib/ruby/gems/1.9.1/gems/activerecord-2.3.8/lib/active_record/connection_adapters/abstract/connection_pool.rb:188:in `block (2 levels) in checkout'
/usr/local/lib/ruby/gems/1.9.1/gems/activerecord-2.3.8/lib/active_record/connection_adapters/abstract/connection_pool.rb:184:in `loop'
/usr/local/lib/ruby/gems/1.9.1/gems/activerecord-2.3.8/lib/active_record/connection_adapters/abstract/connection_pool.rb:184:in `block in checkout'
/usr/local/lib/ruby/1.9.1/monitor.rb:190:in `mon_synchronize'
/usr/local/lib/ruby/gems/1.9.1/gems/activerecord-2.3.8/lib/active_record/connection_adapters/abstract/connection_pool.rb:183:in `checkout'
/usr/local/lib/ruby/gems/1.9.1/gems/activerecord-2.3.8/lib/active_record/connection_adapters/abstract/connection_pool.rb:98:in `connection'
/usr/local/lib/ruby/gems/1.9.1/gems/activerecord-2.3.8/lib/active_record/connection_adapters/abstract/connection_pool.rb:326:in `retrieve_connection'
/usr/local/lib/ruby/gems/1.9.1/gems/activerecord-2.3.8/lib/active_record/connection_adapters/abstract/connection_specification.rb:123:in `retrieve_connection'
/usr/local/lib/ruby/gems/1.9.1/gems/activerecord-2.3.8/lib/active_record/connection_adapters/abstract/connection_specification.rb:115:in `connection'
/usr/local/lib/ruby/gems/1.9.1/gems/activerecord-2.3.8/lib/active_record/query_cache.rb:9:in `cache'
/usr/local/lib/ruby/gems/1.9.1/gems/activerecord-2.3.8/lib/active_record/query_cache.rb:28:in `call'
/usr/local/lib/ruby/gems/1.9.1/gems/activerecord-2.3.8/lib/active_record/connection_adapters/abstract/connection_pool.rb:361:in `call'
/usr/local/lib/ruby/gems/1.9.1/gems/actionpack-2.3.8/lib/action_controller/string_coercion.rb:25:in `call'
/usr/local/lib/ruby/gems/1.9.1/gems/rack-1.1.0/lib/rack/head.rb:9:in `call'
/usr/local/lib/ruby/gems/1.9.1/gems/rack-1.1.0/lib/rack/methodoverride.rb:24:in `call'
/usr/local/lib/ruby/gems/1.9.1/gems/actionpack-2.3.8/lib/action_controller/params_parser.rb:15:in `call'
/usr/local/lib/ruby/gems/1.9.1/gems/actionpack-2.3.8/lib/action_controller/session/cookie_store.rb:99:in `call'
/usr/local/lib/ruby/gems/1.9.1/gems/actionpack-2.3.8/lib/action_controller/failsafe.rb:26:in `call'
/usr/local/lib/ruby/gems/1.9.1/gems/rack-1.1.0/lib/rack/lock.rb:11:in `block in call'
<internal:prelude>:8:in `synchronize'
/usr/local/lib/ruby/gems/1.9.1/gems/rack-1.1.0/lib/rack/lock.rb:11:in `call'
/usr/local/lib/ruby/gems/1.9.1/gems/actionpack-2.3.8/lib/action_controller/dispatcher.rb:114:in `block in call'
/usr/local/lib/ruby/gems/1.9.1/gems/actionpack-2.3.8/lib/action_controller/reloader.rb:34:in `run'
/usr/local/lib/ruby/gems/1.9.1/gems/actionpack-2.3.8/lib/action_controller/dispatcher.rb:108:in `call'
/usr/local/lib/ruby/gems/1.9.1/gems/rails-2.3.8/lib/rails/rack/static.rb:31:in `call'
/usr/local/lib/ruby/gems/1.9.1/gems/rack-1.1.0/lib/rack/urlmap.rb:47:in `block in call'
/usr/local/lib/ruby/gems/1.9.1/gems/rack-1.1.0/lib/rack/urlmap.rb:41:in `each'
/usr/local/lib/ruby/gems/1.9.1/gems/rack-1.1.0/lib/rack/urlmap.rb:41:in `call'
/usr/local/lib/ruby/gems/1.9.1/gems/rails-2.3.8/lib/rails/rack/log_tailer.rb:17:in `call'
/usr/local/lib/ruby/gems/1.9.1/gems/rack-1.1.0/lib/rack/content_length.rb:13:in `call'
/usr/local/lib/ruby/gems/1.9.1/gems/rack-1.1.0/lib/rack/handler/webrick.rb:48:in `service'
/usr/local/lib/ruby/1.9.1/webrick/httpserver.rb:111:in `service'
/usr/local/lib/ruby/1.9.1/webrick/httpserver.rb:70:in `run'
/usr/local/lib/ruby/1.9.1/webrick/server.rb:183:in `block in start_thread'

Would you please help me determine what is wrong!

Thank you and regards,

Olivier.
P.S. Sorry! But I have no idea who is responsible!